中晚更新世松嫩平原轨道尺度上的气候变化  

Climate change at orbital scale in Songnen Plain during the Middle and Late Pleistocene

作　　者：任柄璋 侯红星 睢瑜 王治祥 曹梦梦 詹泽东 时凌峰 西广越 邵兴坤 李利阳 李俊华 REN Bingzhang;HOU Hongxing;SUI Yu;WANG Zhixiang;CAO Mengmeng;ZHAN Zedong;SHI Lingfeng;XI Guangyue;SHAO Xingkun;LI Liyang;LI Junhua(Langfang Natural Resources Comprehensive Survey Center,China Geological Survey,Langfang 065000,Hebei,China;School of Resources and Environmental Science and Engineering,Hubei University of Science and Technology,Xianning 437000,Hubei,China;Key Laboratory of Salt Lake Geology and Environment/Qinghai Institute of Salt Lake Research,Chinese Academy of Sciences,Xining 810008,Qinghai,China;School of Earth Sciences,China University of Geosciences,Wuhan 430074,Hubei,China)

机构地区：[1]中国地质调查局廊坊自然资源综合调查中心,河北廊坊065000 [2]湖北科技学院资源环境科学与工程学院,湖北咸宁437000 [3]盐湖地质与环境重点实验室/中国科学院青海盐湖研究所,青海西宁810008 [4]中国地质大学(武汉)地球科学学院,湖北武汉430074

出　　处：《地质通报》2025年第2期392-403,共12页Geological Bulletin of China

基　　金：中国地质调查局项目《松嫩平原齐齐哈尔地区黑土地地表基质调查》(编号:ZD20220107、DD20220855);中国博士后科学基金(站中)特别资助项目《晚上新世三门古湖记录的天文轨道周期》(编号:2021T140627);中国博士后面上项目《上新世至第四纪早期轨道周期驱动古三门湖沉积演化》(编号:2020M682517)。

摘　　要：【研究目的】松嫩平原位于东亚夏季风的边缘地区,研究该地区更新世湖相沉积记录的水文循环在轨道尺度上的变率,有助于认识轨道尺度上的水循环和古湖生产力在东北地区湖相记录中的演变特征。【研究方法】通过钻孔BQZK05采集样品,使用电子自旋(ESR)测年分析得到约1025 ka以来的沉积记录。结合贝叶斯-年龄深度模型处理ESR年龄数据,利用频谱分析法对TOC(总有机碳)和GR(自然伽马)数据进行周期性分析。【研究结果】ESR贝叶斯年龄-深度模型结果显示,TOC具有约173 ka和约100 ka的显著周期;自然伽马(GR)数据在870~40 ka之间显示主控约173 ka的周期。TOC约100 ka周期信号表明高纬冰量显著影响松嫩平原的植被和湖泊生物生产力变化。【结论】高纬冰量和低纬太阳辐射的变化共同驱动了松嫩平原中晚更新世的气候变化,TOC和GR数据中显著的约173 ka周期信号表明该周期对有机碳埋藏起到重要作用。[Objective]The Songnen Plain,located at the edge of the East Asian Summer Monsoon(EASM),is an important region for studying the variability of the hydrological cycle recorded by Pleistocene lacustrine sediments on orbital timescales.Investigating these variations helps to understand the evolution of the water cycle and ancient lake productivity in the lacustrine records of Northeast China.[Methods]This study applied Electron Spin Resonance(ESR)dating to samples from borehole BQZK05,obtained from the Ground Substrate Survey in the Songnen Plain,to acquire sedimentary records from approximately 1025 ka.The ESR age data were processed using the Bayesian age-depth model,and spectral analysis was performed on Total Organic Carbon(TOC)and Gamma Ray(GR)data to identify periodic signals.[Results]The results from the ESR Bayesian age-depth model show that TOC exhibits significant cycles of approximately 173 kyr and 100 kyr.The Gamma Ray(GR)data from 870~40 ka reveal a dominant~173 kyr cycle.The~100 kyr cycle observed in TOC suggests that high-latitude ice volume significantly influences vegetation content and lake biological productivity in the Songnen Plain.[Conclusions]Changes in high-latitude ice volume and low-latitude solar radiation have jointly driven climate change in the Songnen Plain during the Middle to Late Pleistocene.The prominent~173 kyr cycle observed in both TOC and GR data sequences indicates that this cycle played an important role in organic carbon burial.

关 键 词：松嫩平原 地表基质 轨道周期 更新世 东亚夏季风 

分 类 号：P534.631[天文地球—第四纪地质学] P46[天文地球—古生物学与地层学]